Dualview

A feature found on many laptop computers and some high-end display adapters. Dualview displays what's seen on a laptop onto an external display such as a monitor, flat-panel display, or projector. Many computers that support dualview can also be used it to extend the display horizontally or vertically.

Laptop users

You may have to press a function key on the laptop keyboard to enable/disable the dualview mode or adjust it.

Projector, Video terms